Tag Archives: M-64C

A couple of months ago I scored three M-16C on German eBay. My intention was to do the famous M-16C to M-64C conversion, since an M-64C costs more than the three M-16C together. Plus it’s good soldering practice.

When I got the JX-10, it had no factory sounds – the internal memory was all messed up. To solve this two things are required:

A Roland M-64C cartridge. The JX-10 can only take full dumps, and those can only be done to a cartridge. Once on the cartridge however, they can be copied to the internal memory.

Installing the new firmware is the easiest part. The harder part is to modify an M-16C. So if you choose the easier and more expensive path, just buy an M-64C.

Modification

I’ve found two guides the original one and another one based on the original one. The original guide has a nice description, but very low-res photos. The other one has good pictures but a not much text.

The first thing to do is to desolder the old memory chip from the M-16C and for me this was the hardest part. It took about an hour and I used a solder sucker.

Another thing was to actually understand where to solder each lead. Some are easy to see, some are not. One that shouldn’t be missed is the one that you have to solder beneath the chip before soldering the chip. Here’s a photo from one of the guides, it’s the red lead. It’s connected to the second pin in this photo, very hard to spot, but if you look carefully it’s visible between the blue ones.

You also have to bend a few pins upwards, this is quite clear in the text in the original guide, in the other guide you can see it in this photo.

The final thing to do is to modify the casing, one of the guides recommends a Dremel, for me a filet knife did the job.

The chip side. Note the pins bent upwards. The outer parts of the pin have to be cut.

Bottom side of the PCB.

I modified the case with a filet knife. Trial and error. But this could be used as some kind of template.

Transfering

There are some instructions scattered all over the internet, sosummarized it here: